I don't know of or have heard of anyone middle age or older in my local sphere, at work, at the gym, or really anywhere except the Web who listens to new artists.
Very interesting. I had not thought of this before you made this comment. I find myself agreeing with your observation with the people I know in my age group. No one I know (except my wife) actually listens to anything outside of what they listened to in high school. Even when I suggest new music to my friends/coworkers they look at me like I am crazy and keep listening to the same 12 albums.
I constantly search for new artists/music and my wife will add them to her playlists much to the surprise of her students. I have always been told I have eclectic taste and maybe that is why I am now listening to groups like Morcheeba, Darkside, Monophonics, Ikebe Shakedown, and others.
I wonder if this also affects how we select the equipment in our systems? Something else to consider.